Walter de Gruyter
- Walter de Gruyter published the following 4 sources, containing a total of 4 diagrams.
- Wessels, Ulla. 2002. Die gute Samariterin. Zur Struktur der Supererogation. Berlin: Walter de Gruyter. (3 diagrams)
- Seel, Gerhard, ed. 2001. Ammonius and the Seabattle. Texts, Commentary, and Essays. Berlin: Walter de Gruyter. (0 diagrams)
- Gersh, Stephen. 1996. Concord in Discourse. Harmonics and Semiotics in Late Classical and Early Medieval Platonism. Berlin: Walter de Gruyter. (1 diagram)
- Bucher, Theodor. 1987. Einführung in die angewandte Logik. Berlin: Walter de Gruyter. (0 diagrams)